Billings has a semi-arid climate, with low humidity all year round. Summers (June to August) are sunny, warm and pleasant, with average temperatures between 52°F (11°C) and 87°F (31°C); and autumn is a particularly lovely season with spells of 'Indian summer'. The first frost usually comes at the end of September. Winter (December to February) brings fairly heavy snowfalls, but snow does not accumulate; average winter temperatures stay between 18°F (-8°C) and 40°F (4°C). Warm 'Chinook' winds, during February and March, keep late winter and early spring mild and pleasant.
